MosaicCoder 0.2.1-beta for Minecraft 1.20-1.20.1

• Removed old config system
• Renamed PluginConfig functions
• Functions now will use @JvmStatic
• Will use WeakHashMap for storing configs

Full Changelog: https://github.com/MosaicMC/MosaicCoder/compare/b0.2.0...b0.2.1